help please

[bleak willow]

So I’m studying my practice regents packet for my regions and I don’t understand this question, so can anyone help please?

[main parcel]

1. Wait patiently for a helper to come along.
2. Once someone helps you, say thank you and close the thread with: ```diff
   +close

[light zealot]

one property of a function is that 1 value of x only corresponds to 1 value of y or f(x)

[bleak willow]

What does that mean

[light zealot]

for example the 1st option is not a function cuz at x=2 there are two different values of f(x) which are f(x)=3 and f(x)=7

[bleak willow]

Ok so the numbers that are below x have to relate?

[light zealot]

yes you have to see both x and f(x)

[bleak willow]

So with that being said, It could not be three either

[light zealot]

why?

1 value of x only corresponds to 1 value of y

but 1 value of y can correspond to more than 1 value of x

[bleak willow]

So the x numbers have to be different, but the ycan be the same

[light zealot]

mhm not necessarily, if there are two x=2 with both the same y say f(x)=3, then it's fine, cuz at x=2 there's only 1 y which is f(x)=3

[bleak willow]

Yeah, but that’s if they’re the same

So if all of that it would be number three because there’s two different xwith the same y and it’s not number four because the X and y are the same in one but not the other one

[light zealot]

yes

[bleak willow]

Ok wait thank u I understand it now.

[light zealot]

urwelcome

[ionic orchid]

+close